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Probability 12 Online
OpenStudy (anonymous):

ok so now the problem says "Pollsters are concerned about declining levels of cooperation among persons contacted in surveys. A polster contacts 74 people in the 18-21 age bracket and finds taht 596 of them respond and 15 refuse to respond. When 265 people in the 22-29 age bracket are contacted, 226 respond, and 39 refuse to respond. Suppose that one of the 339 people is randomly selected. Find the probability of getting someone in the 18-21 age bracket or someone who responded

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